To solve this question we have to make deduct these 2 years. 2109 minus 1970 will give the answer.
You are 139 years old.
(1668 months are passed.)
From 1970 to 2109 there are 139 years. If you want to learn your age in 2109 (born in 1970) your age is 139.
Let's see what will be your age if you born +1 or -1 from that date.